Gabriel Białostocki is the saint of interest.
Two saints with similar deaths result of ritual murder (Orthodox - Polish-Russian and Catholic- Italian) .
Giovanni Gasparro, The Martyrdom of St. Simon of Trento in Accordance with Jewish Ritual Murder, 2020.
St. Simon of Trent Italy, a 2 year old boy was tortured to death for Jesus by Jews on March 21, 1475. He was canonized by Pope Sixtus V and his feast day is March 24th. Even though he died so young, one of the popes called him “Our Big Brother”. He is included in the Roman Martyrology. He was outside his parents home when he was abducted. He was undressed, butchered, blood collected in a bowl. They held his body in the form of a crucified Jesus and said: “take this crucified Jesus, just as our forefathers did once, so may all Christians by land and sea parish.” His body was thrown in a river, but God allowed his body to be found is buried in St. Peter’s Church in Trent, Italy. God also allowed all the details to be found out and the assassins punished. In the official court hearings this testimony was given: “The Hebrews killed the little boy Simon, in order to obey rabbinical religious laws: their motive being to serve as most wicked piety and devotion by obtaining Christian blood for celebrating Passover”. When the Jews protested that it was not true, Pope Sixtus IV again heard the case and found it all to be true.
There are two other saint children martyred for Jesus by the Jews: St. William of Norwich 1137 and St. Christopher who was martyred on Oct 17, 1490 at La Guardia Spain. He was canonized by Pope Pius VII. St. Christopher’s death was the last straw that caused King Ferdinand and Queen Isabella to expelled the Jews from Spain.
Ariel Toaff investigated the case of St. Simon to disprove it and then through his investigation was convinced of its truth. He is a Jewish Professor of Medieval and Renaissance History at Bar-Ilan University in Israel, has written Wine and Bread: A Jewish Community in the Middle Ages (1989; translated into English and French), Jewish Monsters: The Imaginary Jew from the Middle Ages to the Early Modern Age (1996).